The Three Phase-In Single Phase-Out Online UPS System is used for environments where electrical isolation is necessary or for equipment that is very sensitive to power fluctuations. Nexus Power Systems manufactures Three Phase-In Single Phase-Out Online UPS System. Nexus Power Systems is an ISO 9001: 2000 certified firm that offers Power Conditioning Equipments like UPS System, inverter, DC Power Supply, Automatic Voltage Regular and Transformer. In the Online UPS System the power ranges are 10, 12.5, 15, 20, 25, 30, 40, and 50 KVA.